Field Notice 64253 - Cisco ISR4321, ISR4331, and ISR4351
ISR4321, ISR4331, and ISR4351 Serial Number Validation Cisco ISR4321, ISR4331, and ISR4351

Cisco ISR4321, ISR4331, and ISR4351 Serial Number Validation Steps:
Please enter the serial number(s) of your ISR4321, ISR4331, and ISR4351(s) below to verify whether a unit is affected. To enter multiple units, separate each serial number by a comma or space, or you can simply copy and paste a list of serial numbers from Excel. Once you have completed entering the serial numbers, click "Submit."
  Serial Number Location:
The serial number of a Cisco ISR4321, ISR4331, and ISR4351 can be found on bottom surface of the ISR appliance or use the "show inventory" command to find the serial number from the CLI.

Enter Serial Numbers as a comma separated list or with one number per line: